iPhone 18 Pro speaker has random popping/crack sound

Hi, I have new iPhone 18 pro 256 Gb Silver. There is a random popping/crack sound coming from the speaker of the phone. It's hard to say which action triggers it, but I heard the sound when turing on and off cellular data and airplane mode. It also happend a couple of times at other random occasions.

Do you have the same problem? Is there any solution? I hope it's software not hardware bug. Maybe it's related to iOS 27?